"Why the Yearbook The Italian Studies in Law?", "Italy and Europe: from Jus commune to Community Law" (Berkeley Public Lectures, 1970), "Verso gli Stati Uniti d’Europa", various drafts of the Lecture "Judicial Review in the European Community: Its Impact on Integration" (held in Cambridge on 22 July 1983), "El control judicial de la Constitucionalidad de las leyes en el derecho comparado" (Spanish translation of "Il controllo giudiziario di costituzionalità delle leggi nel diritto comparato")

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